摘要
利用濮阳、三门峡新一代天气雷达产品,结合卫星、探空、天气图、地面雨量等资料对2006年6月25日发生在河南省北部、西部和中部的强对流风暴过程进行分析发现:(1)此次强对流风暴表现为多个处于不同发展阶段的的强对流回波单体组成长80～400km、宽40km的NE—SW向中β对流回波带即飑线;(2)强对流风暴在发展旺盛期间,其前沿有雷暴出流边界;(3)低层强NW风推动对流回波带向前发展成弓型带状回波;(4)在强对流风暴前侧,紧挨雷暴出流边界内侧产生了一条弧线窄带速度线,随着雷暴出流边界远离强对流风暴主体,该弧线窄带速度线也远离大片的速度区,并逐渐消失;(5)不同性质的强对流天气,其基本反射率、回波顶高、垂直液态积分含水量时有差异。北部雷雨大风伴短时强降水的强对流天气,强中心基本反射率在53～63dBz,回波顶高9～14km,垂直液态积分含水量在38～48kg.m-1之间;而西部中部的雷雨大风伴随局部冰雹和短时强降水的强对流天气,强中心基本反射率在53～65dBz,回波顶高度11～16km,对应垂直液态积分含水量在48～63kg.m-1之间;(5)在强对流风暴发展旺盛时期一直有中气旋伴随,中气旋出现在强对流单体前侧或前侧的入流槽口处。强对流风暴的新一代雷达产品特征是强对流天气监测预警的重要参考依据。
CINRADAR Products of Puyang and Sanmenxia combined with data of satellite, radiosounding, synoptic chart and rainfall station were used to analyze the process of the strong convective weather such as thunder rain as well as local hailstone happened in the north, west and middle of Henan on June 25, 2006. The conclusions are： （1） This strong convection storm showed that several cells for strong convection echo during different development stage consisted to meso-β convective echoes band namely squall line with 80-400km long, 40 km wide and in NE-SW direction. （2） During vigorously developing period of severe thunderstorm there was a thunderstorm outflow border. （3） In the low level strong north-west air flow forced the convective echoes band to grow and form the band echoes like bow shape. （4） There was a velocity line of arc shape short band medial the thunderstorm outflow border in front of the severe convective storm, this velocity line was far away from the area of blockbuster velocity and gradually disappeared with the outflow border away from the main body of strong convection storm. （5） The base reflectivity, echo top and vertical integral liquid water content of different type of severe thunderstorm had distinctions during the strong convection weather with different properties. Thunder wind with short-time strong rainfall weather had the base reflectivity in the strong center of 53-63dBz, echo top of 9-14km and vertical integral liquid water content of 38-48kg/m^2 in the north, while 53-65dBz base reflectivity, 11-16km echo top and 48-63kg/m^2 vertical integral liquid water content in the west and the middle region in Henan Province. （6） There always was mesocyclone during the vigorously developing stage of severe thunderstorm. Mesocyclone occurred in front of severe convection cell or foregoing inflow trough scoop. These CINRADAR products characters of severe convective storm are important reference basements in strong conwection weather forecast and alarm.
出处
《气象》
CSCD
北大核心
2008年第7期92-100,I0007-I0008,共11页
Meteorological Monthly
基金
河南省重大科技攻关项目0522030400
河南省气象局《河南省强对流风暴演变预报技术研究》Z200604研究
关键词
强对流风暴
飑线
弧线窄带速度线
雷暴出流边界
中气旋
severe convective thunderstorm squall line velocity line of arc line short band thunderstorm outflow border mesocydone
